Running examples in 'CrossClustering-Ex.R' failed
The error most likely occurred in:

> ### Name: ari
> ### Title: Computes the adjusted Rand index and the confidence interval,
> ###   comparing two classifications from a contingency table.
> ### Aliases: ari print.ari
> 
> ### ** Examples
> 
> 
> #### This example compares the adjusted Rand Index as computed on the
> ### partitions given by Ward's algorithm with the ground truth on the
> ### famous Iris data set by the adjustedRandIndex function
> ### {mclust package} and by the ari function.
> 
> library(CrossClustering)
> library(mclust)
Package 'mclust' version 5.4.1
Type 'citation("mclust")' for citing this R package in publications.
> 
> clusters <- iris[-5] %>%
+   dist %>%
+   hclust(method = 'ward.D') %>%
+   cutree(k = 3)
> 
> ground_truth <- iris[[5]] %>% as.numeric()
> 
> mc_ari <- adjustedRandIndex(clusters, ground_truth)
> mc_ari
[1] 0.7591987
> 
> ari_cc <- table(ground_truth, clusters) %>%
+   ari(digits = 7)
Error in namespaceExport(ns, exports) : 
  undefined exports: %s!=%, %s!==%, %s+%, %s<%, %s<=%, %s==%, %s===%, %s>%, %s>=%, %stri!=%, %stri!==%, %stri+%, %stri<%, %stri<=%, %stri==%, %stri===%, %stri>%, %stri>=%, stri_datetime_add<-, stri_sub<-, stri_subset<-, stri_subset_charclass<-, stri_subset_coll<-, stri_subset_fixed<-, stri_subset_regex<-, stri_c, stri_c_list, stri_cmp, stri_cmp_eq, stri_cmp_equiv, stri_cmp_ge, stri_cmp_gt, stri_cmp_le, stri_cmp_lt, stri_cmp_neq, stri_cmp_nequiv, stri_compare, stri_conv, stri_count, stri_count_boundaries, stri_count_charclass, stri_count_coll, stri_count_fixed, stri_count_regex, stri_count_words, stri_datetime_add, stri_datetime_create, stri_datetime_fields, stri_datetime_format, stri_datetime_fstr, stri_datetime_now, stri_datetime_parse, stri_datetime_symbols, stri_detect, stri_detect_charclass, stri_detect_coll, stri_detect_fixed, stri_detect_regex, stri_dup, stri_duplicated, stri_duplicated_any, stri_enc_detect, stri_enc_detect2, stri_enc_fromutf32, stri_enc_get, stri_enc_inf
Calls: %>% ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted